he urged congress to expand the debt ceiling as long as possible. >> this economy would benefit from more certainty so the longer the period of time is, the better for the economy. it's really congress' decision how often it wants to vote on the debt limit. >> our guest tonight is skeptical about a debt limit and the stock market rally. he's chief u.s. strategist. hi, david, what is worrying you? is it this short-term six-week deal or something else? >> i think the latest news suggestions we won't get a deal tomorrow or even by monday, so this is already disappointment to a market that got hopeful during the afternoon. i think the market sales off 30, 40 points on the s&p 500 tomorrow. but the good news is investors didn't want the six-week deal. they want a longer-term deal that has more compromise and structure reform to it, so disappointment to the short term but we think we get a better deal by late next week or it could even take longer than that. we think ultimately, a deal is reached, interest payments are not missed and the market climbs higher by the end of the year. >> so d